High-power radio frequency signal generator

Abstract

The invention discloses a high-power radio frequency signal generator. The high-power radio frequency signal generator comprises a signal generation module, two direct current signal amplification modules and a waveform synthesis module; the signal generation module generates two paths of positive half-cycle sine wave characteristic signals with a phase difference of 180 degrees, and the two pathsof characteristic signals are equivalent to dividing a standard sine signal into a first path of positive half-cycle signal and a second path of negative half-cycle reverse signal. The characteristicsignals enter the amplification module to be amplified, and the amplification module only amplifies positive voltage signals, so that the amplification circuit can work in an A-type amplifier mode, but a static working point is close to zero level, and the power supply application efficiency much higher than that of a traditional A-type amplifier can be obtained. The waveform synthesis module inverts the second path of positive half-cycle signal into a negative half-cycle signal, adds the negative half-cycle signal with the first path of positive half-cycle signal to synthesize a standard sinusoidal signal and outputs the standard sinusoidal signal. According to the invention, a standard sinusoidal signal is generated into two paths of positive half-cycle characteristic signals with a phase difference of 180 degrees, and the two paths of positive half-cycle characteristic signals are subjected to direct-current amplification and then are added to synthesize the standard sinusoidal signal. Because the power amplification module only works in a positive voltage state, larger power output can be obtained through simple superposition.

Description

technical field [0001] The invention relates to the fields of physics and electronics, in particular to radio frequency technology, in particular to a high-power radio frequency signal generator. Background technique [0002] Radio frequency is an electromagnetic frequency that can radiate into space, and it is an electromagnetic wave that changes in AC. This alternating electromagnetic wave is easy to carry and spread information, so it is widely used in the fields of communication, military, aviation, medical treatment and process manufacturing. In radio frequency applications, radio frequency is easily absorbed and attenuated, so obtaining high-power radio frequency is one of the main directions of research. [0003] In order to obtain a higher power radio frequency, it is necessary to amplify the radio frequency. Commonly used amplifiers include class A, class B and class AB amplifiers. Class A amplifier is characterized by good linearity but low efficiency; Class B am...

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Problems solved by technology

Class A amplifier is characterized by good linearity but low efficiency; Class B amplifier is characterized by high efficiency but poor signal linearity; Class AB amplifier compromises the characteristics of Class A and Class B amplifiers, and is a high amplification efficiency and Amplifier with good linearity, but there is a certain degree of crossover distortion and generally requires positive and negative power supply system support

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